Cylinder of internal-combustion engines



W. I. STILL.

CYLINDER OF INTERNAL COMBUSTION ENGINES.

APPLICATION FILED MAY 23. 1919.

1A1 Q, M7 Patented Mar. 28, 1922.

2 SHEETSSHEET I.

W. J. STILL.

CYLINDER OF INTERNAL COMBUSTION ENGINES.

APPLICATION FILED MAY 23, 1919.

Patented Mar. 28, 1922 2 SHEETS-SHEET 2.

WILLIAM JOSEPH STILL,

or Lennon; nnernnn.

CYLINDER OF INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent. Pafljentugdl Elan, 2@, 1922,

Original application filed May 19, 1919, Serial No. 298,205. Divided and this application filed May 23,

1919. Serial No. 299,311.

To all whom it may concern Be it known that I, WILLIAM J osnrrr STILL, of 7 Princes Street, London, S. W. 1, England, have invented certain new and useful Improvements in Cylinders of Internal- Combustion Engines, of which the following is a specification.

This invention relates to improvements in and connected with the cylinders of internal combustion engines, and has reference to engines having annularly arranged ports in its cylinder wall or walls.

The object of the invention is to efiect improvements in the construction of a cylinder to provide a greater cooling surface for the exhaust gases and to form the ports in an entablature of the cylinder in the form of arches or hooded pipes so that the gases are deflected from their radial path and the cooling medium in the cylinder jacket circulates around these hooded pipes, as hereinafter described and claimed.

With the above and other objects in view, the invention consists in the construction, combination and arrangement of devices hereinafter described.

In the accompanying drawings l have illustrated my invention, Fig. 1 being a sectional view illustrating a cylinder constructed in accordance with my invention.

Fig. 2 is a sectional plan view thereof, the left hand half of the figure being a sec tion on the line 22 and the right hand half section on the line 2- A and Fig. 3 1s a view illustrating a modified construction of the exhaust port entablature of the liner.

In the drawing, the numeral 1 designates a thin cylinder or liner which is cast with ribs 2, and 3 designates a wrought iron or mild steel hoop which constitutes a pressure resisting sleeve which is forced over the ribs 2. In accordance with the present invention, the cylinder liner is formed with an entablature 11 which may be said to consist of arches or hooded pipes 12 which radiate outwardly from the arch-like port openings 13. The adjoining end of the other cylinder portion 14 is given a toothed or serrated form, the teeth 15 registering with the arch-like port openings 13 and being so shaped as to form the desired shape of ort when the two cylinder parts are assem led together. The entablature aforesaid lies in direct contact with the cooling medium in the cylinder jackets and thus this cooling medium surrounds the arched or hooded pipes 12 aforesaid and ensures adequate cooling, the ports areas are ample and the joint betweenthe two adjoining cylinder parts is The arrangement of adjoining cylinder portions is specially applicable to the particular form of engine described and illustrated in the specification of my prior Eritish Letters Patent No. 25356 of 1910. In the present example the cylinder portion 14: forms the steam cylinder which adjoins the combustion chamber. The construction of the cylinder in parts is in large engines important from a constructional point of view, but apart from this. it has very real value in that it leaves the lower edges of the ports free to move relatively to the port faces without cracking at their juncture such as must take place before move-' ment could occur if the cylinder were-all one piece. Provisions for relative free expansion is of considerable importance in large engines because the magnitude of the parts would cause these movements to be sufficient to set up severe strains if relative movement were not possible The result of the construction accordin to my invention is that the usual port ngers now become necessary, their place being taken by apart of the cylinder wall, the remainin portion of which is indented or corruga to form a deflecting passage way to an annular port 16 situated beyond the opening in the liner wall. 1

It is by no means essential that the lower edge of the liner 11 shall be in line with the bottom of the ports 13 as in Fig. 1 since it may descend far below the horizontal as in Fig. 3 as also thelower wall of the liner 11 may be horizontal as shown in Fig. 1 or inclined as Fig.3.

What I claim and desire to secure by Letters Patent is 1. An internal combustion engine cylinder llO 15 tions also having exhaust ports comprisingtwo aligned portions having serrations on their opposing edges arranged to co-operate in abutting engagement with one another, one of said portions also having exq haust ports in the form of arched radiating and downwardly extending chambers, the other portion having downwardly and outwardly extending passages forming a continuation of said arched chambers.

2. An internal combustion engine cylinder comprising upper and lower aligned portions having serrations on their opposing edges arranged to co-operate in abutting engagement with one another, one of said porin they form of arched radiating and downwardly extending chambers, the other portion having downwardly and outwardly extending passages forming a continuation of said arched chambers, a jacket surroundin" said upper cylinder portion and in whic the walls of said exhaust'port chambers are arranged so that said walls are in contact with the cooling fluid in said water jacket, and a water jacket surrounding the lower f cylinder portion and in which the walls of said passages are arranged for contact with the cooling fluid in said lower 'acket.

In witness whereof I afli x m 'si ature. WILLIAM J OSEPli S ELL. 

